iverilog -o omicron_tb -c file_list.txt -I ../../des -I /opt/Xilinx/13.2/ISE_DS/ISE/verilog/src/unisims -I /opt/Xilinx/13.2/ISE_DS/ISE/verilog/src/XilinxCoreLib -g2001 -s omicron_tb -v 
vvp omicron_tb
gtkwave test.vcd
